Filter



FIG. 1 is a top perspective view of a filter showing our new design;

FIG. 2 is a front view thereof, the rear view being a mirror image;

FIG. 3 is a left side view thereof, the right side view being a mirror image;

FIG. 4 is a top side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 4;

FIG. 7 is an enlarged portion of FIG. 1; and,

FIG. 8 is an enlarged portion of FIG. 4.

The broken lines illustrate structure or features which form no part of the claimed design.

The dot-dash broken lines in FIGS. 7 and 8 illustrate cut lines to show partial enlargements and form no part of the claimed design. 

CLAIM The ornamental design for a filter, as shown and described. 